Sleep
Learning Center
Blepharitis
This often chronic eyelid condition can be difficult to treat. It might be uncomfortable, but it doesn't usually damage eyesight and isn't contagious.
Bladder cancer
Blood in the urine (hematuria) sometimes is a sign of bladder cancer. Learn about other bladder cancer signs and symptoms and explore treatment options.
Bicuspid aortic valve
This condition, present at birth, affects the valve between the lower left heart chamber and the body's main artery. Know the symptoms and treatment.
Benign prostatic hyperplasia (BPH)
This common problem, also known as an enlarged prostate, can be treated.
Bedsores (pressure ulcers)
These areas of damaged skin and tissue are caused by sustained pressure — often from a bed or wheelchair — that reduces blood flow to vulnerable areas of the body.
Basal cell carcinoma
Learn about symptoms, treatment and prevention of this common skin cancer that often occurs on the head and neck.
Atrial fibrillation
A fast, pounding heartbeat could be due to AFib, a type of heart rhythm problem. Know the warning signs and when treatment is needed.
Arthritis
Learn about how different types of arthritis affect joints in different ways, along with how to get relief from arthritis pain.
Arteriosclerosis / atherosclerosis
Learn about the symptoms, causes and treatments for hardening of the arteries.
Aortic dissection
This life-threatening condition occurs when blood leaks through a tear in the body's main artery (aorta). Know the symptoms and how it's treated.
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